| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
1.1%
|
| 2 | Every few weeks | 19 |
4.2%
|
| 3 | Every few months | 65 |
14.4%
|
| 4 | Not at all | 363 |
80.3%
|
| Sysmiss | 53 |